Telefonaktiebolaget Lm Ericsson (publ)

Björn Hofström

Icaro L J Da Silva

John Walter Diachina

Jonas Sedin

Nicklas Johansson

Jens Bergqvist

Helka-Liina Määttänen

Xingqin Lin

Olof Liberg

Paul Schliwa-Bertling

Min Wang

Mårten Sundberg

Jan Christoffersson

Claes-Göran Persson

Sebastian Euler

Henrik Rydén

Jinhua Liu

Siva Dharshan Muruganathan

Helka-Liina Määttanen

Henrik Enbuske

Zhenhua Zou

Gino Masini

Talha Khan

Ulf Händel

Birgitta Sagebrand

Johan Rune

Yi-Pin Eric Wang

Robert Mark Harrison

Jose Luis Pradas

Magnus Åström

Stefan Rommer

Zhipeng Lin

Emre Yavuz

Mats Folke

Gunnar Bergquist

Martin Israelsson

Mikael Wittberg

Stefan Eriksson Löwenmark

Hazhir Shokri Razaghi

Hans Torstensson

Buffer Status Reports (BSR), by which the network is made aware of uplink transmission needs of wirless devices, are specifically enabled to be transmitted using 2-step Random Access (RA), to reduce latency and network resource use. In one embodiment, 2-step RA configurations tailored to BSR-transmissions are introduced. These may, for example, use a subset of the configured resources in the configured 2-step RA resources for BSR. In another embodiment, conditions for triggering BSR over 2-step RA, depending on the traffic, are introduced. For example, the priority or the the delay budget of the traffic may be used to determine whether a BSR over 2-step RA should be triggered. In another embodiment, simplified procedures when receiving the response to MsgA are introduced. These may include, for example, not transmitting a full MsgB, but rather having the UE receive an UL grant.

Efficient buffer status reporting over 2-step RA

A method () performed by a wireless device () includes obtaining a remaining service time (T) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Power efficient non-terrestrial network connection establishment

A method performed by a wireless device for mapping data to specific HARQ processes is provided. The method includes receiving an indication that maps data that can be sent on one or more of specific HARQ processes and transmitting/receiving a transmission for the specific HARQ process based on the received indication. A method performed by a base station for mapping data to specific HARQ processes is also provided. A wireless device and a base station for mapping data to specific HARQ processes are also provided.

LCH mapping to HARQ process ID for non-terrestrial networks

Embodiments herein relate to, e.g., a method performed by a UE for handling communication of data in a wireless communication network. The UE transmits a scheduling request, SR, indicating a buffer status of the UE or along with an indication indicating the buffer status of the UE.

Network node, UE and methods performed therein for handling communication

A system, method and non-transitory computer readable media for facilitating reduced signaling load with respect to UE location reporting in a non-terrestrial network (NTN) environment () interoperable with one or more terrestrial cellular communications networks. In one embodiment of an index-based location reporting scheme, a UE () may receive () a list of reference locations from a network node (), each identified with an index. Responsive to receiving the list of reference locations, the UE () may report to the network node () an index or a subset of indices of one or more reference locations that match a specific reporting criterion. In an example implementation, reporting of index-based location information by the UE () may be configurably triggered, e.g., periodically or in response to the occurrence of a particular event, condition, etc.

System and method for facilitating index-based positioning in a non-terrestrial network

A wireless device () is configured for use in a wireless communication system (). The wireless device () configures a number of parallel hybrid automatic repeat request, HARQ, processes () as being available for use. The wireless device () discontinuously monitors a downlink control channel (), including monitoring the downlink control channel () during an active time () that is based on how many of the configured number of parallel HARQ processes () are used.

Discontinuous reception in a wireless communication system

Systems and methods for adapting a timer(s) for a satellite-based radio access network are disclosed. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device comprises obtaining a value to be used to offset, extend, and/or scale one or more timers related to the satellite-based radio access network relative to values for non-satellite-based radio access networks. The method further comprises utilizing the value to offset a start of one or more timers, extend one or more timers, and/or scale one or more timers and performing one or more actions based on the one or more offset timers, the one or more extended timers, and/or the one or more scaled timers. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

Systems and methods for timing adaptation for satellite communications

A network node of a wireless communication network provides information to a User Equipment (UE) that allows the UE to adapt it radio measurements with respect to the network, to account for 'link changes.' Link changes are service-link and/or feeder-link changes arising from motion by the satellite(s) included in the Radio Access Network (RAN) portion of the network. The UE uses the provided information to adapt its radio measurements in conjunction with the link changes. Among the several advantages of accounting for satellite link changes in the manner contemplated are any one or more of reduced signaling going between the UE and the network, reduced battery consumption at the UE, mitigation of the effects of the link changes on the radio measurements, avoidance of spurious measurements, and an effective “automation” of the timed changeover by the UE to new measurement configurations, coincident with the occurrence of link changes.

User equipment, network node and methods therein for handling a moving radio access network

Embodiments include methods performed by a wireless device for random access to a wireless communications network. Such methods include transmitting a random access preamble in a first uplink (UL) bandwidth part (BWP) of a carrier and selecting a first downlink (DL) BWP of the carrier based on an association between the first UL BWP and the first DL BWP. Such methods include monitoring the first DL BWP for a random access response from the wireless communication network to the transmitted random access preamble. Other embodiments include complementary methods for a base station configured to support random access by wireless devices, as well as wireless devices and base stations configured to perform such methods.

Random access procedure

A method performed by a first network node () for enabling a second feeder link () to be established between a second network node () and an airborne or orbital communication node () in non-terrestrial communications network () to handle wireless devices () being served by the airborne or orbital communication node () is provided. The first network node () is handling the wireless devices () served by the airborne or orbital communication node () over a first feeder link () between the first network node () and the airborne or orbital communication node (). The method comprises determining () that the wireless devices served by the airborne or orbital communication node () are to be handled by the second network node () over the second feeder link (). Also, the method comprises initiating () the second feeder link () to be established between the second network node () and the airborne or orbital communication node (). Further, a first network node () for enabling a second feeder link () to be established between a second network node () and an airborne or orbital communication node () in non-terrestrial communications network () to handle wireless devices () being served by the airborne or orbital communication node () is also provided. A second network node and a method therein, as well as, computer programs and carriers are further provided.

Network nodes and methods therein for enabling a switch between feeder links for an airbourne or orbital communication node in a non-terrestrial communications network

A method performed by a network node () includes serving a cell area by a first physical network node for a first time duration. The first physical network node uses an identifier of a logical network node. For a second time duration, the cell area is served by a second physical network node. The second physical network node uses the identifier of the logical network node. The first physical network node serves the cell area with a first frequency band and the second physical network node serves the cell area with a second frequency band.

Methods for tracking area management for moving RAN

A method in a User Equipment (UE) for control of Bandwidth Part (BWP) switching. The method includes determining that the UE has an active configured grant in a non-default BWP; and refraining from switching from the non-default BWP to a default BWP while the configured grant is active.

Methods and devices for control of bandwidth part switching

Embodiments include methods performed by a wireless device for random access to a wireless communications network. Such methods include, using a physical random access channel (PRACH) configuration that is associated with a first index, transmitting a random preamble to the wireless communication network in an uplink (UL) bandwidth part (BWP) of a carrier. Such methods also include selecting a first downlink (DL) BWP of the carrier based on an association between the first index and the first DL BWP and monitoring the first DL BWP for a random access response from the wireless communication network. Other embodiments include complementary methods performed by a base station, as well as wireless devices and base stations configured to perform such methods.

One aspect of the disclosure provides a method for a terminal device in a wireless communications network, wherein the terminal device is configurable with a plurality of logical channel groups. The method comprises generating buffer status information and transmitting a message to a network node operative in the wireless communications network. The message comprises a buffer status report comprising the buffer status information. The buffer status report comprises respective indications, for each of the plurality of logical channel groups, of the availability of data to transmit in the terminal device for the logical channel group. The buffer status report further comprises respective buffer size fields, for one or more of the logical channel groups for which data is available to transmit, indicating an amount of data which is available to transmit.

Methods and apparatus relating to buffer status reports in a wireless communication network

Embodiments described herein provide methods and apparatus for performing a random access procedure to access a wireless communications network. A method in a wireless device comprises responsive to transmitting a first random access preamble to a base station using first random access resources in an uplink, UL, bandwidth part, BWP, of a carrier: selecting, based on an association, a first downlink, DL, BWP of the carrier, wherein the association maps a plurality of DL BWPs of the carrier to different values of a parameter related to physical random access configurations and/or to different UL BWPs of the carrier; and monitoring the first DL BWP in order to receive a random access response from the base station.

Growing community of inventors

Linköping, Sweden

Björn Hofström